The python-ldap project is unable to provide wheels because it's not compatible with the manylinux1 format: https://github.com/python-ldap/python-ldap/issues/191#issuecomment-375308846
According to https://www.python-ldap.org/en/latest/installing.html#build-prerequisites the necessary dependencies are: libldap2-dev libsasl2-dev.
This is needed by the ldap tool to move away from gridengine and onto k8s.